Method for descaling hot-rolled stainless steel strip

Details Method for descaling hot-rolled stainless steel strip Method for descaling hot-rolled stainless steel strip

1991-04-19

1992-07-21

Echols, P. W.

Metal working

Scale remover or preventor

Fluid impingement

29 8112, 29 8101, 134 15, B21C 4300

Patent

active

051311267

ABSTRACT:
A descaling method for removing oxide scale from a hot-rolled stainless steel strip. A solution of an alkaline earth metal chloride is applied to the surface of the oxide scale layer formed on the hot-rolled stainless steel strip, and the solution is allowed to penetrate into the oxide scale layer. In a subsequent annealing, the solution is heated and dehydrated to become solid matter and the dehydrated matter is melted and diffused into the oxide scale layer to soften the oxide scale layer. The oxide scale layer is then removed by a simple mechanical descaling by, for example, grinding brushes with or without a subsequent chemical descaling by a weak acid solution.

REFERENCES:
patent: 3617039 (1971-11-01), Fukui et al.
patent: 3715236 (1973-02-01), Fukui et al.
patent: 3778309 (1973-12-01), Jackson
patent: 3873280 (1975-03-01), Block et al.
patent: 4619708 (1986-10-01), Bothner
patent: 4872245 (1989-10-01), Kawasaki et al.

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